Holy Shock + Nova stack?

So, I heard that if you have a bow like Kuko that fires explosive arrows, and you have holy fire going, then the holy fire damage will stack onto the explosion damage, that is, affecting everyone hit by it, not just the main target.

Was wondering if you have something like Warshrike (which has ctc Nova), and you have holy shock going, would the holy shock attack damage affect everything hit by the Nova, as well?

If so then a dual dream thrower paladin with conviction might be something fun to try out

AFAIK, only attack skills made with weapons/arrows can add elemental damage (doesn't matter in this case if the elemental damage comes from holy aura, enchant or gear). Nova is a spell so it can't stack with holy shock.